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Unified constitutive model for steel creep and cyclic viscoplastic behavior simulation based on absolute reaction rate theory

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Document pages: 13 pages

Abstract: The viscoplastic and creep behaviors of modified 9Cr-1Mo and 316 stainless steel were studied in this paper. Based on the absolute reaction rate theory, a unified constitutive model including internal state variables is proposed to describe the evolution of back stress. The model is implemented by ABAQUS system with semi implicit stress integration. The results show that this method can effectively simulate the cyclic softening and hardening behavior of this kind of structural steel.

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